Carbureter.



G. W. DONNING.

CARBURETERl APPLICATION FILED AuG,26.1915.

Patented June 18, 1918.

2 SHEETS-SHEET l.

e0/:ge W. Ummng G. W. DONNING.

CARBURETER.

APPLICATION FILED Aue.2l6. 1915.

Patented June' 18, 1918.

2 S H EETS- SHEET 2.

l l 2 a III Iwllfoz. George M4 00u/7i@ UNin "s GEORGE W. DONNING, 0FSTANFORD, CONNECTICUT, ASSIGNOR TO DONNING CARBU- RETER CORPORATION, OFESOPUS, NEW YORK, A CORPORATION OF NEW YORK.

CARBURETER.

Specification of Letters Patent.

Patented J une 18, i9i8.

Application led August 26, 1915. Serial No. 47,531.

broadest aspects, is to utilize air for heating the walls of acarbureter-and, in certain instances, the motor inlet-manifold-temperedto substantially the same degree asthe air which is used for making thegaseous mixture in the carbureter, there being novel means (such as anelectric device) provided for controlling the temperature of the airautomatically, the electric device being thermostatically controlled.

Still another object is to effect the automatic preheating operation inthe event that the temperature of the air or of the gaseous mixtureshould, at any time, porarily, below a predetermined point.

Still anotherobject within the contemplation of the invention is toprovide a ther mostatic device, preferably arranged in the path oreffective zone of the heating fluid, and which will not only control thetemperature of the air, but also render the air-preheater active orinactive and, moreover, effectan operation of valves which controlvarious air ports; such device being adjustable so that differenttemperatures may be selected to accord with different grades of fuelthat may be used, with consequent economy in the employment of the same.

A further object of the invention is to provide means for releasing,into the atmosphere, the heated air (or portions thereof) before itreaches the carbureter chamber, in accordance with the requirements ofthe motor. f

The invention in general seeks to provide a structure in which thevarious instrument-alities have a certainty of action to accomplish therequired results, and which structure, from an operative standpoint, iseffectual at all times and which structurally con= sidered, is simpleand compact and, while fall, even tem-v funCtiOning, requires little ifany regulatlng.

Other objects and advantages of the invention will be more or lessapparent from the appended drawings and will be made entirely clear fromthe following description.

In order that the invention may be readily comprehended, drawings arehereto appended and which are illustrative of a preferred.

embodiment of the invention; it being understood, however, that the sameis capable of a wide range of modification and is susceptible ofutilizations different from that revealed.

In the drawings;

Figure l is a view in vertical section of a carbureter constructed inaccordance with one embodiment of my invention;

Fig. laL is a similar View of a modified form of structure, the samebeing constructed in accordance with a somewhat different embodiment ofthe invention, and in which the heating-device in the air-conduitoccupies adiflerent position than in Fig. 1;

Fig. 2 is avfragmentary view of a modilied form of air-intake structure;

Fig. 3 is a fragmentary view of a modified form of air and controllingdevice; and

Fig. 4 is a collective view in detail of parts of the air andcontrolling device.

.Referring to the drawings, it will be noted that thereference-character 1 designates the outline of a combustion motor,which may include one or a shown.

Connected with the motor, in any appropriate manner, asby'inlet-manifolds 2, is my improved carbureter designated, generally,by the reference-character 3. In this instance, the manifolds aresurrounded by a jacket 4 which provides a channel 5 adapted to contain aheating iiuid'which, in this in.- stance, is air. The channel issupplied with heating fluid from a source and in a manner presently tobeexplained.

Preferably and as shown, the carbureter includes a mixing chamber 6 andan airchamber 7.A These chambers are separated by a corrugatedvalve-member 8 which, being of thin resilient metal, is flexible andadapted to seat upon a circumferential ridge 9 extending inwardly fromthe walls of the carbureter. The plate 8 is provided with a pluralityof. cylinders, not i seiies o epeitures i0, :is shown. @epenfiing fromthe piate is e uei-eontioiiing valve il oiining en extension of e steini2 which carries e `ein 13 adapted to engage in e siot le oiined in emovable arm i5 piyote on a, slide member 16. l s shown, this slide mernber extends through the wail ofthe @erbuietei, projects beyonfi theexterior sui'ieoe thereof, and eariies e, iinniied heaei 1?, By thisslide, en adjustment oic the eini l5 may be effected.

The mn 15 is sustained in e noiinaily horizontal position by beingettaeired to e link 18 pivotaliy connected to a 'tiiiotte- Valve i9which in tuin, is piyoted et 20. The valve is positionsbie 1oy anypieeiieo, ineens? and which may be those usually eniliioyed in this typeof stnetuie, By adineting the Min l5 thi'ongh the siide-ineinioe i6, tnefiile-inni oiq the anni is siiiieteoi towafd the iight o1' left, Wheiebythe position the nicinm of 'the iini 'i8 may be eiiengesi and, thiis,the, extent oiE movement oit the ya-iyes 8 anti ll may be yeiie.

Mounted. in and npstending fiom the ioot toin-poition 2 o'f tiieeoiiouretei is e, nei nozzie 22 pmi/ideal with :i passage 23 which theValve ii is adeptee to be seatefi to oontoi the seine, This nozzie isenooinn wie eoii l du ti g wires 24 iittei being es enelA vizeei oypfesentiy to 'be desea/'foei ste'tiono. ez 2 may be matie integrof Wifi'L nozzie. 22 anais snee insite "ice, tee "nw,

e eneoznpass :ceeeive inn tiie is- -lo v ye le, as e esoy ....7 i .L Conen Jee in t en steai mit se eioozed ehemeei:

against entifenee nino t 'o by 'die Valve S, since it will oe seete on me 1M 51.2 the neige 9 ine wine-tion oi toe noies i@ yelyeplete 8 is ofsince tno 't' e Sile' L,

emi portions oi? *Siae pieta from the iiig'e 9, if the aiipessnfeagainst the folate caused by suction be suiieient.

The eiongete formation of the veive il and of the Weils of the passage23 permit :in exact adjustment' thereof. As shown in i? ioi instance,the passage 23 is enlarged to oini e ehambe 28. Beiow this Chamber 28 isa passage 29 in Wiiieh e eyiindi'icai "poition 3G o the Veive "il isguided. The ohenibei 28 provides foi the stofege of a, small quantity ofnel which may 1beileoteii by the electric heater 25. Leading into thechamber 28 ae Channels 28a through which uei flows thereinto fiom belowThreaded into the nozzle 22 is e uf-Cou @ling 8i adapted to Toeoonneoted to sources M diqerent gedes of uei,` geinlits 'the use oigasoiene or kerosene, oi both mixed. To this end, a. Veiye 31a isiisposeol in the eoneiing, its construction being such (es shown) thattiie uei may ow 'thougii its Ysiieped eiiennei from one arm oi theY-eouyaiing, oi oni the othei eine7 ei' iiom both.,

@peiling :to the mixing-chamber 6 is en eniiiiaiiy siii-port 32 that iseontoiie ioy et spiing-press-e yaiye 33.

Monnteei in e lippe? poition the Geiiniete and pieeiebiy in the peti?.of i'iow of the gaseous inintnie fiom the mixing- AChania-ei* 6 themanifolds 3 is e easing eonteinin@ e ioieftiie iiquiol. The eesportion3'3"., Bece oinjie of tiie enteioi" sniiaoe 'the is a space 38 in whicheasing se, and neing 'Meent with the poi- -Jngeif 3% may, es

nien, v @time of e sin. nete mi,

1ie Cep l may 'oe heid iete-f d feeding @et shown @heresy to pieyentieeiiege., L e and eXoos-eoi 'gestion ef the @hingen is? es shown.i'video with e seiies oi@ esses of iio es -29 @Respondingteniloeif'atnegieuens and i o may insetee. 1pins 4:3 .fi poni-tei1 5 ontiie eine 36 iegtefs anetiie iie ziiioieinentenioeietnie-gedu@tiene esthe moves ne oi {iov-.13,

ci gaseous mixture, it passes yCont/ents Witii a een wiiiV-n "nes eAAlso pivoted on the standard 47 isa lever 54 adapted to be engaged bythe pin 43 in the plunger 39, and'which is held against the pin 43 by aspring 55, the tension of which may be controlled by" avtensioningdevice 56. Pivoted to the lever 54 is an actuating rod 57which, at its other end, is connected to a valve-member 58.

4 Formed in the carbureter and in juxtapo' sition to the mixing-chamber6, the thermostat-casing 34 and the air-chamber 7 are channels 61, and63 referably communicating with the channe s 5 formed in the walls ofthe intake-manifolds, and into these channels air from an air-conduit(presently to be described) is introduced and the temperature of whichis influenced-raised, for instanccgby the tempered air passing into thechamber from said air-conduit.

To protect these channels from extreme heat or cold, I may incase thecarbureterwalls, etc., with a covering 64 of asbestos or the like. Toprotect the asbestos from injury, a metallic casing 654 (Fig. l) may beutilized.

The lower, angular portion 66 of the carbureter, forming a part of theair-chamber 7, is provided with a' plurality of air-ports 67, 68 and 69,which are controlled, respectively, by the valve-member 58, formed of aplurality of cover-elements 71 and 72 and controlled by the actuatingrod 57. The air-port 68, as shown, is formed by an air intake extensionof the portion 66 and is adapted to introduce into the carbureter airdrawn fromthe atmosphere.

Connected with the air-port 69 'is an airconduit (Fig. 1) which may beprotected, as by a metallic and asbestos casing 74 as shown,Afragmentary, at the right-hand end of the conduit.

The lower portion of the carbureter is provided with an opening 7 A5 toreceive heated air which is'adapted to circulate into the channelsaforementioned.

Suspended in the air-conduit is aheatingcoil 76 and to thisA areconnected, as by wires 77 and 78, the terminals 79 and 80. Connectingthe terminals 79 with the switchdevice 51 is a conducting wire 81.Connecting the terminal 80 and the battery 5 3 is a.

conducting wire 83. Between the switchdevice 51 and the terminal 49, onthe confunctions.

yheating coil will become .For instance,

ducting wire 50, is a signal light 84. The aforementioned conductingwire` 26 is connected with the wire 81, while the wire 27 is connectedwith the wire 83. Between the ends of the heating-coil 76 is inte osed aterminal 82. When the wire 81a is etached from the terminal 79 andattached to the terminal 82, only a portion of the coil will beenergized when the current is on, thus enabling one to vary the heatingcapacity of the.airconduit. l

Mounted at the end of the air-conduit 73, and extendin in alinement withor below the plane of ghe air-chamber 7, is an airheater 85 providedwith an air-inlet 86 and encompasslng a portion of the exhaustmanifold87, whereby the'contained air may be heated.

Operation: Assuming that the switch-de vice 5l is on and that thecarbureter is cold, the plunger 39 of the thermostatic` device will bein itslowermost position; hence the arm 48 will be in contact with theterminal 49, completing the circuit through the wires and 52, thebattery, heating coil, etc., whereupon said heating coil will beenergized and generate heat in the air-conduit. Incidentally, also, thesignal light will be lighted and this will indicate to the driver thatthe parts are performing their proper air-conduit and the channelscommunicating therewith, the mixing-chamber, etc., and the mixture havebecome suiiiciently heated, the plunger 39 will be raised by theexpansion of the volatile fluid 35. This will permit the arm 48 to berocked out of contact with the terminal 49 by its spring, breaking thecircuit, whereupon the signal or light and the inactive. At the sametime, the lever 54 will be raised by the plunger and this will cause theactuating rod 57 to operate the valve deviceto open both orts 67 and 68,thereby partially or comp etely checking the iow of air passing throughthe conduit 69. While the lever 54 may at times be operated manually, itgen-v erally is under the control4 of the thermostat plunger. The timeand extent of operation, with relation to the temperature of thecontents of the carbureter, may be predeter- The moment that the air,-in the mined by the driver according to which of the holes 42 containsvthe pins 43 and 44.V if thepin 43 is inserted in that hole 42 which isbelow the one in which it is now shown, obviously, the plunger 39 willhave a longer movement before it positions the pin against the lever 54;hence, the rod 57 and the valve 58 will not be operated as quickly,wherefore, the temperature of the air passing through the airconduitwill increase and influence the contents of the casing 34 and cause theplunger 39 to have the longer movement just referred to. When these areonce adjustedl by the driver for any o' e 'piiiieiity oi iueis, they meyipe?-s meneiitiy te eiit ajiisteei se tiiet, Wiiitei oi' summe?, oiduring sudden changes oi the atmosphere, thei'e is no need. foieti-justiiieiits to meet such etmospiieiio changes.

iii e @pending eppiieetion, Serial No. 863,369, @ed Sept, 2%, i934, toyme and others, valve mechanism is .shown peitiy or eompieteiy cutting otile het of eoiti eil1 iiom either ef two poets. "in the pientstruetiiie, emi' es iiiustiste it. liig', l, thiee ports sie disclosed.The advantage oiE the this@ port is that when it is opened, some of theeil heeteci in the eii= eoiduit Wiii escape thiough the port 37 into theatmospiiei'e. Moieovei, the ieoming eii tends to Gooi the iieeted siiuiii the conduit. The eooie, out sifle air would, in the streets-1e efsaid eopendiiig application, tenti te eeoi the ee.- iouietei, itself;or, iii one oi the posts is pertiy open, oi the metei oi the eebuietei'becomes too iiot, eii of 'toe High tempeiefture :may be edmittefi tethe mixing-ehembei 'with e consequent overheating oi tile mixtute.

ii Fig. 2, have shows e somewhat medi fied tomi oi ooiistiuetion: inthis insteiiee,

the veiveeotuetiiig ioci 57 is pivote@ e two-membeied Weise-devise 88,one 'pei-t si which eoiitiois the pet-L89 While the etiiei eoiitiois thepoet 1%. TMViieii the @relive-de- -fit-e is iii the position it assumes,Wiles tiited, the poise S9 eed 19@ "Wii ioe oigeiieci, Whiie passage eiei? vtiiiioug1 o the een-duit et the iight heeft?. side ei tile Weisedevise 88 wiii thereby te est of? to eif to fiow into the eendiiitthiougie the 80.,

Ee Figsa 3 emi li, tieve shown e mediiied -eiiii of sii emiiiei-eoiitieiiiiig device disooseei between the miiiin-efiemiiei ti theeis-elsemosi 7. 'This iiieiiides e 9i adapted to 1oe seated upon eeiiietiiA eieiitiei rif ge oi seat The disk 9i is eoeiieeteii to totToes e, movement iiiepeiitieiit e 'piste 93 is meiieteiiied iii yieitlesieietioii thefete by e, these-sinned ieemeei* 9e @i resilient meteiieiwhich is, itseii, eeffiied by] e Vaise-stem 95 seg, este? iay en eim 96which is oi eoiistiiietioii ties the opetetioii eseii'be with Teieeiieeto the ione of device shown ie L Tiri-e disk 9i is provided with disk 9iis formed Wi Gentse-i op 98 eiietis iiormeiiy heim i iiigiy iii seat byiesiiieiit aries o tiiet ev passage is iet es meieteiiiing e speeed feiniiiom membei Se, ieweied, the disk 9i es@ pemitted to come intoenge-gerne however, the aim 96' is ieiseti,

may have e slight moi/ement este); from the disk 9i., Then, consi eieeiesee tion ei the meter Wiii ieise dis 9i iet-o el gegemeiit with 'themeilioei 9%,

gs oi posts ,07, The' igeeeee 'Here-in, it iegeifti the eieetiieeis-heater, oiq the eieetiie fuel-heater, oiq beth, es fprimeiy oiinit-iai heaters, While 'the exhaustoperative due to the operation oi"the tilesmostetio device which, becoming eooi, Wiil ectuste the poitsend will ooiitroi the fictivity .of the heating coil in the air-conduit.

By this invention, the eoit has been mede to deveep a eerbuietei whichemtodies, es permanent parte, certain 'heating end coolinginstrumenteiities heietoi-oi'e regereisd. es seesonei attachments; and.,thereby, e, ceroureter is produces? which is not Variatie, due te theVsriabiiity ei atmospiieiie end. otiie conditions.

My sti'uotui aie Deeuiieiiy etiepted to sefiuce, to e minimum, thepossibility of iiies. the event that the essieuKeteiq shouid be iired,it is only necessary to reieese the throttie-eeiitioi and permit theiiiei-ve-ive (enti the pests eemtioiled` thereby) te engage its seat emitheieby eut 0E the How ei :tuei into the eeiiiuietei, Wioeieuioee thefiume would Tte seii'ed out.

Fieie the ieregoieg, it wiii be seen that ii iieve devised e oariouseteiwhich is Weii etielitee to eeiiieve the objeets emi ens in View, Thestiiiotuie is exoeediiigiy simple ments oi the iiii'eiitien een be medeWithout tem the spiit tiieieei, is intended that eli mettei eoiiteiieciiii the foregoing deseii15ieii emi shoe-Iii L the eeoomfoeiiyiegdewiiigs shell be iiitepiete. es iiiiistietive es' "t met iii e iimitingseese ez;- eept es Emi-tations eije expieesseti il'i the oieims wieteis-Jim is:

i, fi eeiioiiietei including piovioieti with en eieiiiiet enti emiXtue-outiet, mee-ns independent-oi the oeibiiietef-ehem bei ioi1beating sii peing into eeibu feter, ene-i e jacket suiiiouiiding theeiiemsei to leiovicie e eiieiiiei 'between the ehe-miler the gasket eeo.dosed. the ehemioeiu housing; e ioofiy oi sie iii-eiepeiifieet of theeii1 iiitioiieeei into the ehembei' emi 'ineens Within. the eiismioei"ieiieiice-:l

its contents oi eeifitioiiiiig the tempeietiiie n 1 e eilq enteiiig theoLeiiiie' 'Wiieieby eating of the ehembei bythe ieete; sie ie e eiiemiei,is pi'efveiiteci.

fi eeibui'eteif ineiudieg e et Witi ee. air-miei: enti e meansindependent of the carbureter-chamber for heating air passing into thecarbureter, a jacket surrounding the chamber to provide a channelbetween the chamber and the jacket and closed against the chamber forhousing a body of air independent of the air introduced into thechamber, means within the chamber and influenced by its contents forcontrolling the temperature of the air entering the channel wherebyoverheating of the chamber by the heated air in the channel isprevented, and an intakemanifold provided with channeled walls, thechannel thereof communicating with the channel surrounding thecarbureter-chamber.

3. A carbureter including a chamber pro- .vided with an air-inlet and amixture-outlet, and means independent of the carbureterchamber forheating air passing into the carbureter, a jacket surrounding thechamber to provide a channel between the chamber and the jacket forcontaining a bodyof air-independent of the air introduced into thechamber, a temperature controlling means within the chamber andinfluenced by the contents thereof to govern the temperature oi' the airpassin into the carbureter, and an intake-mani old provided with achannel in its walls which communicates with the channel surrounding thecarbureterchamber.

4. A carbureter including a plurality of chambers, an air-jacketsurrounding one of the chambers, valve-mechanism for controlling theiiow of air between the chambers, an air-conduit communicating with oneof the chambers and with the jacket, and a plurality of independentlyoperable heating means within the air-conduit for heating air atdifferent points therein and for iniiuencing the temperature of the airin the jacket.

5. A carbureter including a mixingchamber and an air-chamber,valve-mechanism between the chambers for controlling the How of air fromthe latter to the former, an air-jacket disposed about themixingchamber, an airconduit communicating with the air-chamber and withthe jacket, heating means within the air-conduit, and a second heatingmeans adjacent one end of the conduit for heating air preliminary to itspassing into the air-chamber; said valvemechanism operating, when in itsclosed position, to hold a portion of the air temporarily in theair-chamber; said heating means being eiiective to heat the air beforeit passes into the air-chamber, and, also, acting to influence thetemperature of the air in the air-jacket.A

6. A carbureter including a mixing-chamlber and an air-chamber, valvemechanism between the chambers for controlling the flow of air from thelatter to the former, an airjacket disposed about the mixing-chamber, anair-conduit communicating with the airchamber and with the jacket,heating means within the. airconduit, a second heating means adjacentone end of the conduit for heating air preliminary .to its passing intothe air-chamber; said valve-mechanism operating, when in its closedposition, to hold a portion of the air temporarily in the airchamber;said heating means being eective to heat the air before it passes intothe airchamber and, also, actin to influence the temperature of the airin t e air-jacket; said air-conduit being -provided with atleast threeports; and valve-mechanism for controlling the passage of air throughthe airconduit and through two of the ports therein.

7. A carbureter including a mixing-chamber, a mixture-outlet, anair-chamber, valvemechanism between the chambers for controlling theflow of air from the latter to the former, an air-jacket disposed aboutthe mixing-chamber, an air-heating means within the air conduit, asecond heating means adjacent one end of the conduit for heating airpreliminary to its passing into the air-chamber; said valve-mechanismoperating, when in its closed position, to hold a portion of the airtemporarily in the` airchamber; said heating means being eiective toheat the air before it passes into the airchamber and, also, actingl toiniiuence the temperature of the air in the air-jacket; said air-conduitbeing provided with at least three ports; valve-mechanism forcontrolling the passage of air through the air-conduit and through twoof the ports therein, and valve-actuating mechanism acting under theinfluence of the temperature of the mixture which passes through themixture-outlet for operating the valve-mechanism of the air-conduit.

8. A carbureter including a mixing-chamber, a mixture-outlet, anair-chamber, valveadjacent one end of the conduit for heating airpreliminary to its passing into ,the airchamber; said valve-mechanismoperating, when in its closed position, to hold a portion of the airtemporarily'in the air-chamber; said heating means being effective toheat the air before'it passes into theairchamber and, also, acting toinfluence the temperature of the air in the air-jacket; saidair-'conduit being provided with at least three ports; valve-mechanismfor controlling the passage of air through the airconduit and throughtwo of the ports therein, and valve-actuating mechanism acting under theinfluence of the temperature of the mixture which passes through themixture-outlet for 'operating the valve-mechanism of the air-conduit andcomprising a thermostatic device hureter,

9. l earhureter-structure inch hamher, air-conduit eomm f 'Y chemio-erand pre1-fit ed i rarity ci ports, valve-mechanism l-- ciosing elementsfor two oi the ports i operable to close air-conduit against the passageoit air into the chamber through a portion oi the conduit and sa 'timeopening at least two oi the ports the indow o air through one 'oi the'ports from the outside into the air-conduit chamber and for the outiiowoi1 air a portion oit the conduit through another oi the ports into theoutside atmosphere and means for heating the contents o the airconduit,

l0. A carhureter-structure including a mining-chamber, an air-condunJcommunicating with the chamber and'provided with a plurality of ports,valve-mechanism including closing elements Jfor two of the ports andoperable to close said air-conduit against the passage or" air into thechamber through a portion. of the conduit and at the same time openingat least two of the ports for the inflow of air through one of the portsfrom the outside into the air-conduit and chamber and for the outflow ofair from a portion of the conduit through another of the ports into theoutside atmosphere, means itor operating said valve-mechanism and meansfor heating the contents of the airconduit.

1i. A carbureter-structure including a mixing-chamber, an air-conduitcommunicating with the chamber and provided with. a plurality of ports,valve-mechanism including closing elements for two oi the ports andoperable for closing said air-conduit against the passage of air intothe chamber through a portion of the conduit and at the same timeopening at least two of the ports for the iniow of air through one ofthe ports from the outside into the air-conduit and chamber and for theoutow of aire from a portion of the conduit through another of the portsinto the outside atmosphere, means for operating said valve-mechanismincluding a thermostatic device adjacent to and iniuenced by thetemperature of the contents of the chamber and means for heating thecontents of the air-conduit.

12. A carbureter-structure including a mixing-chamber, an air-conduitcommunicating with the chamber and provided with a plurality of ports,valve-mechanism including closing elements for two of the ports andoperable for closing said air-conduit against the passage of air intothe chamber through a portion of the conduit and at thesame time openingat least two of the ports for the inflow of air through one of the portsfrom the outside into the aber ior the outof air iront a portion theconduit rough another o ports into the outside atmosphere, means oroperating said valveniechanisin including a thermostatic device adiacentto and influenced hy the temperature ci the contents of the chamber,means for heating the air in the conduit, and means disposed between thethermostatic device the conduit whereby the former controls thetemperature of the latter.

i8. i carbureter including a mixingchaniloer, an air-chamber,valve-mechanism interposed between the chambers for controlling the iiowof air from said air-chamber into said mixing-chamber, a channel formedaround the chambers, an air-conduit communicating with the air-chamber,heating means within the air-conduit, said air-conduit being providedwith three ports, and valve-mechanism common to two of the three portsfor controlling the same and operable to close the conduit at one sideof one of the ports.

lll. A carbureter including a mixingchamber, an air-chamber,valve-mechanism interposed between the chambers Jfor controlling theflow of air from said air-chamher into said mixing-chamber, a channelformed around the chambers, an air-conduit communicating with theair-chamber, heating means within the air-conduit, said airconduit beingprovided with three ports, valve-mechanism common to two of the threeports for controlling the same and operable to close the conduit at oneside of one of the ports, and mechanism acting under the iniiuence ofthe temperature of the contents of the carbureter for actuating saidvalvemechanism.

15. A carbureter including a mixingchamber, an air-chamber,valve-mechanism interposed between the chambers for controlling the flowof air from said air-chamber into said mixing-chamber, a channel formedaround the chambers, an air-conduit communicating with the air-chamber,heating means within the air-conduit, said airconduit being providedwith three ports, valve-mechanism common to two of the three ports forcontrolling the same, and means comprising a thermostatic device housedentirely within the carbureter and acting under the influence of thetemperature of its contents for actuating said valve-mechanism andoperable to close the conduit at one side of one of the ports.

16. A carbureter having a chamber, a throttle-valve therein, air andfuel-controlling valves in the chamber, an air-conduit communicatingwith the carbureter chamber and provided with a plurality of ports, aheating device within the air-conduit for heating air passing to andbeyond the controlling valve, valve-mechanism for control- 'ling thepassage of air through said airconduit and through the ports andoperable 'to close th'e conduit against passage of air andsimultaneously to permit the iow of air through at least one of saidports, means includin a thermostatic device disposed within thecarbureter chamber and iniuenced by the temperature of the contentsthereinfor controlling the temperature of the contents of the'air-conduit previous to passing said controlling valves, resilient meansoperative on said temperature-controlling means and tending to overcomethe Influencing action of the thermostatic device, and means forrendering said resilient means active.

17. A carbureter including a chamber, a throttle-valve therein, air andfuel-controlling valves in the chamber, an air-conduit communicatingwith the carbureter chamber, a heating device within the air-conduit forheating air passing to and beyond the controllin valve, means includinga thermostatic device disposed within the carbureter chamber andinfluenced by the temperature of the contents therein for controllingthe temperature of the contents 'of the air-conduit previous to passingsaid controlling valves, resilient means operative on said 'thermostaticdevice, sa1d reslllent means active, and a valve for` ,trolling valveand tending to temperature-controlling means and tending to overcome theinfluencing action of the means for rendering controlling ow of fluidinto the nozzle and operatively connected to said resilient meanswhereby operation of the valve eliects a tensionmg of the resilientmeans.

18. A carbureter including a chamber, fuel-controlling means for flow offuel thereinto, an air-inlet communieating with' the chamber andprovided with a port, a valve controlling the port, a thermostaticdevice inuenced by the temperature of the contents of the chamber, acounteracting-device adjacent the port-coninfiuence the action of thethermostatic device, and a connection between the counteracting-deviceand Athe fuel-controlling means whereby operation of the counteractingdevice sets the fuel-controlling means.

In testimony whereof I alx my signature in presence ot two witnesses.

GEORGE W. DON N IN Gr.

' Witnesses:

FRANK R. Fowmm, BERTHA W. Auusolv.

governing the

